I agree that it's a good analogy to call it a male hysterectomy. Maybe how I can help is to explain exactly what I did...
I'm in the camp that the ejaculation of semen causes POIS. I think that premise also has been taken by Dr. Waldinger, and others on the forum. I didn't necessarily know if it was an allergic reaction, or if it was something else. I actually thought that my body was unable to comfortably produce the amount of semen that I was ejaculating and would take it as biological priority to replenish semen after it was released, thereby robbing the rest of my body of certain essential ingredients, thereby causing the POIS reaction. I know this theory might sound wacky to some people.
Initially I sought to reduce the amount of semen my body produced, while leaving the responsible organs intact/ in place. However, I wasn't able to do that. And eventually turned toward total dry ejaculation and stopping semen production as the solution. In a way that I could still have erections, have orgasms, and still enjoy sex.
In any case, my solution worked, which was to surgically achieve dry ejaculation, by removing the organs that produce all the components of semen- Minus the prostate- which instead of removing, was shrunk.
It's still consistent with Dr. Waldinger's theory of semen allergy. It's possible I could have developed a semen allergy, and broken the blood/ semen barrier when I took the enlargement pills, which stretched out and expanded my organs.